Anchoring end structure of steel strand

Abstract

The utility model provides a steel strand anchoring end structure which comprises an anchor rod and a tensioning sleeve, one end of the anchor rod is inserted into a rock stratum, the exposed end of the anchor rod is provided with a connecting plate, the connecting plate is provided with a swinging end capable of swinging, the swinging end is provided with a connecting rod part, a steel strand is provided with a steel strand clamping head, and the two ends of the tensioning sleeve are in threaded connection with the connecting rod part and the steel strand clamping head correspondingly. The connecting rod part and the steel strand clamping head are opposite in thread turning direction, a detachable hinge pin is arranged at the joint of the swing end and the connecting plate, and the problem that a short-period temporary engineering anchor rod connecting structure is not easy to disassemble and assemble is solved.

Description

Technical Field

[0001] This utility model relates to the field of steel strand connection, and in particular to a steel strand anchoring end structure. Background Technology

[0002] In hydropower engineering, inclined and vertical shaft construction often uses steel strands as load-bearing lines. Conventionally, one end of the steel strand is directly anchored in concrete. However, concrete anchoring is difficult, and if the anchoring point deviates, it is hard to correct. To solve these problems, this design uses anchor rods to secure the steel strand to the surrounding rock. The steel strand is connected to the anchor rod connecting plate via pins, transferring the load-bearing capacity to the surrounding rock. Because of the pin connection, the steel strand is easy to install and disassemble and can be reused, improving efficiency and reducing costs.

[0003] Chinese Patent CN 210238291 U discloses a main cable anchoring device for a cable hoisting system, which provides a good anchoring effect for the main cable. However, in such projects, the pulled end, such as the cable, does not move frequently, so it adopts a semi-permanent connection structure that is not easy to disassemble. For some temporary engineering tasks, the anchoring end structure often needs to provide a load-bearing point, such as anchor rods used as temporary lifting points in the construction of water diversion tunnels and inclined shafts. After the construction of a single point is completed, it needs to be quickly transferred to the next location for construction. Therefore, this type of structure is not suitable. Utility Model Content

[0004] This utility model provides a steel strand anchoring end structure, which solves the problem that steel strand anchoring structures are not easy to disassemble and assemble.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a steel strand anchoring end structure, including an anchor rod and a tensioning sleeve. One end of the anchor rod is inserted into the rock stratum, and the exposed end of the anchor rod is provided with a connecting plate. The connecting plate is provided with a swingable swing end, and the swing end is provided with a connecting rod part. The steel strand is provided with a steel strand clamp. The two ends of the tensioning sleeve are respectively threaded to the connecting rod part and the steel strand clamp. The threads of the connecting rod part and the steel strand clamp are in opposite directions. A detachable hinge pin is provided at the connection between the swing end and the connecting plate.

[0006] In the preferred embodiment, one end of the swing end is provided with a U-groove, one end of the connecting plate is inserted into the U-groove, and both the side wall of the U-groove and the connecting plate are provided with through holes, into which the hinge pin is inserted.

[0007] In a preferred embodiment, the steel strand clamp includes a clamping sleeve and an outer end sleeve. The clamping sleeve is sleeved with the end of the steel strand, and the two ends of the outer end sleeve are through. The outer end sleeve is provided with a U-shaped groove, and one end of the U-shaped groove is provided with a stop end. The clamping sleeve is inserted into the U-shaped groove, and the stop end abuts against the end of the clamping sleeve. The end of the outer end sleeve is threadedly connected to the tensioning sleeve.

[0008] In a preferred embodiment, the hinge pin includes an optical shaft portion, one end of which is provided with an end cap, and the other end of which is provided with a screw portion. The hinge pin is rotatably sleeved with the connecting plate and the swing end, and the screw portion is provided with a limit lock nut.

[0009] In the preferred embodiment, the diameter of the screw section is smaller than the diameter of the optical axis section.

[0010] In a preferred embodiment, the end of the screw section is provided with a groove, and a hinged stop block is provided in the groove. The center of gravity of the stop block is slightly lower than the hinge axis so that the stop block is vertical and the upper and lower ends of the stop block protrude from the outer wall surface of the optical axis section.

[0011] In a preferred embodiment, a stepped pin is also provided, which includes a smooth shaft section and a threaded section. A second through hole is provided on one side wall of the grooved part, and a smooth hole section and a threaded hole section are provided on the other side wall of the grooved part. The smooth shaft section is inserted into the first through hole, the second through hole and the smooth hole section, and the threaded section is threadedly connected to the threaded hole section.

[0012] The beneficial effects of this utility model are as follows: the anchor bolt connection structure adopts a detachable hinge pin connection, which facilitates quick disassembly and assembly and transfer to other anchor bolts; the use of swing end head allows the steel strand to be connected adaptively according to the angle, so that the anchor tension direction always coincides with the steel strand, improving the stress condition and increasing the reliability of the device. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the application of the anchoring end structure. Figure 1 .

[0015] Figure 2 This is a schematic diagram of the application of the anchoring end structure. Figure 2 .

[0016] Figure 3 This is a diagram of the steel strand clamp connection structure.

[0017] Figure 4 This is a diagram showing the clamping sleeve not being properly tightened.

[0018] Figure 5 This is a schematic diagram illustrating the application of the hinged pin optimized structure.

[0019] Figure 6 This is an optimized structural diagram of the hinge pin.

[0020] Figure 7 This is a diagram showing the vertical state of the stop block.

[0021] Figure 8 This is a diagram showing the lateral state of the stop block.

[0022] Figure 9 This is a sectional view of the step pin.

[0023] In the diagram: Anchor bolt 1; Connecting plate 2; Swinging end 3; Connecting rod 301; U-groove 302; Through hole 303; Hinge pin 4; End cap 401; Smooth shaft 402; Screw 403; Limit lock nut 404; Grooved part 405; Stop block 406; Step pin 407; Smooth shaft section 408; Threaded section 409; First through hole 410; Second through hole 411; Smooth hole section 412; Screw hole section 413; Tensioning sleeve 5; Steel strand clamp 6; Clamping sleeve 601; Outer end sleeve 602; U-groove 603; Stop end 604; Steel strand 7. Detailed Implementation

[0024] Example 1:

[0025] like Figure 1-9 In this invention, a steel strand anchoring end structure includes an anchor rod 1 and a tensioning sleeve 5. One end of the anchor rod 1 is inserted into the rock stratum, and the exposed end of the anchor rod 1 is provided with a connecting plate 2. The connecting plate 2 is provided with a swingable swing end 3, and the swing end 3 is provided with a connecting rod part 301. The steel strand 7 is provided with a steel strand clamp 6. The two ends of the tensioning sleeve 5 are respectively threaded to the connecting rod part 301 and the steel strand clamp 6. The threads of the connecting rod part 301 and the steel strand clamp 6 have opposite directions. A detachable hinge pin 4 is provided at the connection between the swing end 3 and the connecting plate 2.

[0026] The surrounding rock is pre-drilled, and after the anchor rod 1 is inserted, anchoring cement grout is poured into the hole and left to solidify.

[0027] After the connecting plate 2 is slotted, it is welded to the end of the anchor rod 1.

[0028] The tensioning sleeve 5 can be rotated to adjust the distance between the steel strand clamp 6 and the connecting rod 301, thereby controlling the tension of the steel strand 7.

[0029] In the preferred embodiment, one end of the swing end 3 is provided with a U-groove 302, one end of the connecting plate 2 is inserted into the U-groove 302, and both the side wall of the U-groove 302 and the connecting plate 2 are provided with through holes 303, and the hinge pin 4 is inserted into the through holes 303.

[0030] The connecting plate 2 is inserted into the U-groove 302, and the swing end 3 can swing to adapt to the installation angle.

[0031] Since the clamping sleeve 601 needs to be fixed to the steel strand 7 by extrusion, if the thread structure is directly pre-machined on the clamping sleeve 601, deformation will inevitably occur.

[0032] In a preferred embodiment, the steel strand clamp 6 includes a clamping sleeve 601 and an outer end sleeve 602. The clamping sleeve 601 is sleeved with the end of the steel strand 7. The two ends of the outer end sleeve 602 are through. The outer end sleeve 602 is provided with a U-shaped groove 603. One end of the U-shaped groove 603 is provided with a stop end 604. The clamping sleeve 601 is inserted into the U-shaped groove 603. The stop end 604 abuts against the end of the clamping sleeve 601. The end of the outer end sleeve 602 is threadedly connected to the tensioning sleeve 5.

[0033] The outer end sleeve 602 is pre-threaded onto the steel strand 7, and then the clamping sleeve 601 is fitted onto it. The clamping sleeve 601 has a mesh layer on its inner side. The short and thick clamping sleeve 601 is extruded into a slender shape using a standard extrusion machine. The inner mesh layer is embedded in the gaps between the steel strands to increase adhesion. The outer wall diameter of the clamping sleeve 601 after extrusion is slightly smaller than the inner diameter of the U-shaped groove 603 of the outer end sleeve 602. After the clamping sleeve 601 is fitted, it is stopped by the stop end 604. The outer end sleeve 602 is provided with an external thread structure for connection with the tensioning sleeve 5.

[0034] In a preferred embodiment, the hinge pin 4 includes an optical shaft portion 402, one end of which is provided with an end cap 401, and the other end of which is provided with a screw portion 403. The hinge pin 4 is rotatably sleeved with the connecting plate 2 and the swing end 3, and the screw portion 403 is provided with a limiting lock nut 404.

[0035] In the preferred embodiment, the diameter of the screw portion 403 is smaller than the diameter of the optical axis portion 402.

[0036] Due to the different diameters, a shoulder is formed at the junction of the screw section 403 and the screw section 403. After the limiting lock nut 404 is locked against the shoulder, it forms a stop structure with the end cap 401, which can prevent the hinge pin 4 from moving axially.

[0037] In a preferred embodiment, the end of the screw portion 403 is provided with a groove portion 405, and a hinged stop block 406 is provided in the groove portion 405. The center of gravity of the stop block 406 is slightly lower than the hinge axis so that the stop block 406 is vertical and the upper and lower ends of the stop block 406 protrude from the outer wall surface of the optical axis portion 402.

[0038] The stop block 406 has a hinge hole in the center, and the lower end of the hinge hole is relatively long. Therefore, under natural conditions, due to gravity, the stop block 406 is in a nearly vertical position. If the limit lock nut 404 is loosened, it will be stopped by the stop block 406 to prevent the hinge pin 4 from coming out of the through hole 303 in the connecting plate 2 and the swing end 3. When the limit lock nut 404 needs to be installed or removed, the stop block 406 can be manually moved to a horizontal position.

[0039] In a preferred embodiment, a stepped pin 407 is also provided. The stepped pin 407 includes a smooth shaft section 408 and a threaded section 409. A second through hole 411 is provided on one side wall of the grooved portion 405, and a smooth hole section 412 and a threaded hole section 413 are provided on the other side wall of the grooved portion 405. The smooth shaft section 408 is inserted into the first through hole 410, the second through hole 411 and the smooth hole section 412, and the threaded section 409 is threadedly connected to the threaded hole section 413.

[0040] The step pin 407 has an internal hex wrench docking structure at its end.

[0041] Example 2:

[0042] A steel strand anchoring end structure comprises an anchor rod 1, a connecting plate 2, a swing end 3, a connecting pin 4, a tensioning sleeve 5, a steel strand clamp 6, and a steel strand 7.

[0043] The fixed end of the steel strand 7 is anchored in the surrounding rock through drilling and grouting. The anchor rod 1 is made of threaded steel bar. The drilling depth in the surrounding rock is not less than 10m. Two anchor rods are installed in each hole, and the anchor rods are spaced at least 50mm apart. The head of each anchor rod is welded with a connecting plate 2. One end of the connecting plate 2 has a groove and the other end has a connecting pin hole. When the connecting plate 2 is welded and fixed, the thickness center line coincides with the center line of the anchor rod. At the same time, the connecting plates 2 of the two anchor rods should be coaxial. The swing end 3 is made of round steel. One end is machined with external threads and the other end has a groove. The two side plates of the groove have strip-shaped pin holes. The swing end 3 is connected to one end of the turnbuckle sleeve tensioner 5 by thread and the other end is connected to the connecting plate 2 by connecting pin 4. The other end of the turnbuckle sleeve tensioner 5 is connected to the steel strand clamp 6 by thread. The steel strand clamp 6 has external threads and is fixed to the end of the steel strand by compression.

[0044] This device, connected by a connecting pin, ensures that the axis of the swing end 3 and the tensioning sleeve 5 is always aligned with the steel strand, thus allowing the direction of the steel strand's load-bearing capacity to be unrestricted by angle on the connecting plate plane during use. This structure, connected by a pin shaft, allows the connecting pin 4, tensioning sleeve 5, steel strand clamp 6, and steel strand 7 to be moved to other positions for repeated use.

[0045] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A steel strand anchorage end structure, characterized in that: It includes an anchor rod (1) and a tensioning sleeve (5). One end of the anchor rod (1) is inserted into the rock layer. The exposed end of the anchor rod (1) is provided with a connecting plate (2). The connecting plate (2) is provided with a swingable swing end (3). The swing end (3) is provided with a connecting rod part (301). The steel strand (7) is provided with a steel strand clamp (6). The two ends of the tensioning sleeve (5) are threadedly connected to the connecting rod part (301) and the steel strand clamp (6) respectively. The threads of the connecting rod part (301) and the steel strand clamp (6) are in opposite directions. A detachable hinge pin (4) is provided at the connection between the swing end (3) and the connecting plate (2).

2. The anchoring end structure of the steel strand according to claim 1, characterized in that: One end of the swing end (3) is provided with a U-groove (302), and one end of the connecting plate (2) is inserted into the U-groove (302). The side wall of the U-groove (302) and the connecting plate (2) are provided with through holes (303), and the hinge pin (4) is inserted into the through hole (303).

3. The anchoring end structure of the steel strand according to claim 1, characterized in that: The steel strand clamp (6) includes a clamping sleeve (601) and an outer end sleeve (602). The clamping sleeve (601) is sleeved with the end of the steel strand (7). The two ends of the outer end sleeve (602) are connected. The outer end sleeve (602) is provided with a U-shaped groove (603). One end of the U-shaped groove (603) is provided with a stop end (604). The clamping sleeve (601) is inserted into the U-shaped groove (603). The stop end (604) abuts against the end of the clamping sleeve (601). The end of the outer end sleeve (602) is threadedly connected to the tensioning sleeve (5).

4. The anchoring end structure of the steel strand according to claim 1, characterized in that: The hinge pin (4) includes an optical shaft part (402), one end of which is provided with an end cap (401), and the other end of which is provided with a screw part (403). The hinge pin (4) is rotatably connected to the connecting plate (2) and the swing end (3). The screw part (403) is provided with a limit lock nut (404).

5. The steel strand anchorage end structure according to claim 4, characterized in that: The diameter of the screw section (403) is smaller than the diameter of the optical axis section (402).

6. The steel strand anchorage end structure according to claim 5, characterized in that: The end of the screw part (403) is provided with a groove part (405), and a hinged stop block (406) is provided in the groove part (405). The center of gravity of the stop block (406) is lower than the hinge axis so that the stop block (406) is vertical and the upper and lower ends of the stop block (406) protrude from the outer wall surface of the optical axis part (402).

7. The steel strand anchorage end structure according to claim 6, characterized in that: A stepped pin (407) is also provided. The stepped pin (407) includes a smooth shaft section (408) and a threaded section (409). A second through hole (411) is provided on one side wall of the grooved part (405). A smooth hole section (412) and a threaded hole section (413) are provided on the other side wall of the grooved part (405). The smooth shaft section (408) is inserted into the first through hole (410), the second through hole (411) and the smooth hole section (412). The threaded section (409) is threadedly connected to the threaded hole section (413).

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